117 results about "Superconducting quantum computing" patented technology

The invention relates to a cloud-native-based quantum classical hybrid task scheduling system, and the system comprises an application program interface which is used for receiving a task request sent by a user; the cloud native gateway is used for distributing task requests; at least one quantum classical hybrid computing platform, each computing platform comprising: a classical computing power resource scheduling center for providing classical computing power resources; the quantum computing power resource scheduling center is used for providing quantum computing power resources such as a superconducting quantum computer, a light quantum computer, an ion trap quantum computer and a semiconductor quantum computer; the task scheduling master control center is used for receiving a task request distributed by the cloud native gateway, scheduling classical computing power resources of the classical computing power resource scheduling center or quantum computing power resources of the quantum computing power resource scheduling center to execute a task corresponding to the task request based on the task request, obtaining an execution result and sending the execution result to the cloud native gateway; and returning the execution result to the corresponding user through the application program interface.

The invention relates to a quantum gate simulation and control parameter optimization method based on numerical calculation, and the method sequentially comprises the following three modules: a model Hamiltonian matrix representation module can calculate the matrix representation of a model Hamiltonian according to a specific problem; a time evolution and fidelity calculation module of the system discretely solves a Schrodinger equation by using a Hamiltonian matrix, gives a corresponding time evolution matrix, and calculates gate operation fidelity by using the obtained time evolution matrix; and the control parameter optimization module calls the first two modules, optimizes control parameters and quantum gate operation time by adopting a local optimization algorithm or a global optimization algorithm, and gives optimal control parameters and gate operation time. The problem that the gate fidelity of a current superconducting quantum computing system cannot meet the requirement for reliable operation of a practical quantum algorithm is solved, the detailed process of quantum gate operation can be simulated through a numerical calculation method, and the quantum gate operation fidelity is improved by optimizing control parameters.

Systems, methods, and apparatus for multiplexed control and readout of quantum computing systems that can include qubits, couplers, and other related quantum computing circuit devices. Numerous examples of superconducting quantum computing systems are described that include some, or all, of these quantum computing circuit devices integrated into a superconducting quantum circuit that can be interfaced by a classical control system. In one example, a superconducting circuit is described. The superconducting circuit includes: a superconducting device including a superconducting loop interrupted by one or more Josephson junctions; a first microwave resonator inductively coupled to the superconducting loop of the superconducting device; a second microwave resonator capacitively coupled to the superconducting device, where the first and second microwave resonators each have a different fundamental frequency; and a microwave transmission line evanescently coupled to each of the first and second microwave resonators.

The invention relates to the technical field of superconducting quantum computing, and discloses a hole structure metallization deposition method and system, a sacrificial layer is deposited on the surface of a silicon substrate, a hole structure with a preset depth-to-width ratio is etched on a to-be-processed substrate, a substrate with the hole structure is obtained, a first metal material is used for surface deposition of the substrate with the hole structure, and a metallization deposition layer is formed on the surface of the substrate with the hole structure. The preparation method comprises the following steps: forming a hole structure on a substrate, forming a metal induction layer on the surfaces of the substrate and the hole structure to obtain a substrate with the metal induction layer, performing magnetron sputtering on the substrate with the metal induction layer by using a second metal material, and applying a magnetic field around the substrate with the metal induction layer to form a metal film on the surface of the metal induction layer, and obtaining the substrate with the hole structure subjected to metallization deposition. The metal coverage in the holes can be improved by using a metal induction mode, and the deposition uniformity of particles in the holes can be ensured by combining a magnetic field applying mode, so that a deep hole scene can be well dealt with.

Aa superconducting computing apparatus includes: frequency tunable devices connected to each other and arranged in a shape; a ferromagnetic film disposed adjacent to the frequency tunable devices and having an up magnetic domain or a down magnetic domain; and a control circuit configured to adjust a position of a magnetic domain wall in the ferromagnetic film by applying a current to the ferromagnetic film, wherein the position of the magnetic domain wall controls a resonant frequency of the frequency tunable devices.

The embodiment of the invention provides a quantum hardware resource virtualization method and device, electronic equipment and a storage medium. The method comprises the following steps: acquiring a target quantum bit unit topology for a target quantum computing task; obtaining a quantum bit unit network in the quantum hardware resource; in the quantum bit unit network, obtaining a plurality of candidate quantum bit unit sub-networks conforming to the target quantum bit unit topology; based on the self-operation fidelity of each quantum bit unit in the candidate quantum bit unit sub-network and the mutual operation fidelity between adjacent quantum bit units, determining the overall operation fidelity of the candidate quantum bit unit sub-network; and based on the overall operation fidelity, determining a target quantum bit unit sub-network as a virtualization resource for the target quantum computing task. According to the embodiment of the invention, the utilization rate of virtualized resources is improved, and relatively high operation accuracy is ensured. The embodiment of the invention can be applied to various scenes such as quantum calculation and superconducting quantum calculation.

The invention provides a quantum bit unit mapping method, a related device and a medium. The method comprises the following steps: acquiring a gate operation sequence and a plurality of logic quantum bits for executing target quantum calculation; mapping the plurality of logical qubits to a plurality of candidate physical bit units of a physical hardware resource; generating candidate adjustment modes for the first mapping relation based on a first rule, and respectively applying the candidate adjustment modes to the first mapping relation to obtain a plurality of second mapping relations; mapping the plurality of logic quantum bits to a plurality of mapped physical bit units of the physical hardware resource according to each second mapping relation, and determining a target mapping relation based on the matching degree of the plurality of mapped physical bit units and the gate operation sequence; and mapping the logic quantum bit to a target physical bit unit of the physical hardware resource according to the target mapping relationship. According to the method and the device, the number of the swap gates needing to be increased in the mapping process can be reduced. The method can be applied to various scenes such as quantum calculation and superconducting quantum calculation.

The invention discloses a quantum bit rapid initialization method and system and a superconducting quantum computer. The method comprises the following steps: calibrating quantum bit reading cavity frequency, excited state frequency, Raproportion oscillation between a ground state and a first excited state and Raproportion oscillation between excited states; calibrating the transverse field driving frequency of the decoration state and the transverse field driving frequency of the excitation state; quantum state evolution probabilities under different transverse field driving amplitudes are measured, and a transverse field driving parameter with the fastest initialization rate is determined; and transverse field driving parameters are applied to corresponding channels to realize rapid initialization of the quantum bits. The system comprises a waveform generator module, a combiner module, a quantum carrier module and a reading display module. The superconducting quantum computer comprises the system and executes the method. According to the invention, the equivalent coupling strength between the quantum bit and the resonant cavity can be rapidly changed, the rapid dissipation channel is constructed by using the extremely strong photon dissipation rate of the resonant cavity, and the rapid initialization of the Fluxium quantum bit is realized.

The application discloses a superconducting quantum computing chip based on a corrosion-resistant Josephson junction and a preparation method thereof. The superconducting quantum computing chip comprises a substrate, a plurality of superconducting quantum bits arranged periodically on a first surface of the substrate, each of the superconducting quantum bits comprising two capacitive electrodes and a Josephson junction connecting the two capacitive electrodes, and a protective layer on a surface of the Josephson junction.

The invention discloses a coupling pulse distortion compensation method for superconducting quantum computing, and relates to the field of signal processing, and the method comprises the steps: S1, inputting an initial square wave signal into a first IIR filter, and reducing the frequency attenuation of superconducting quantum bits; s2, outputting the initial square wave signal to a second IIR filter to improve the high-frequency component of the initial square wave signal; s3, outputting the initial square wave signal to a third IIR filter to eliminate pulse back edge reflection of the initial square wave signal; and S4, outputting the initial square wave signal to a first FIR filter to carry out ripple correction so as to complete pre-distortion correction. By setting the staged pre-distortion compensation of the three-section IIR filter and the one-section FIR filter, the pre-distortion compensation of the square wave signal is more accurate and stable, the square wave edge response is rapid and the amplitude is correct, and the time delay and the amplitude error caused by the link are reduced; the quantum bit Z-axis phase control method has the advantages that quantum bit Z-axis phase control is more accurate, and the fidelity of a square wave signal gate is prevented from being reduced.

The invention provides a method for executing a dynamic quantum circuit on a superconducting quantum computing device, a superconducting quantum computing system and a computer readable storage medium, and the method comprises the following steps: dividing the dynamic quantum circuit into at least one main circuit and at least one control sub-circuit, the main circuit is a circuit which is not influenced by a measurement result in the dynamic quantum circuit during execution, and the control sub-circuit is a circuit which is controlled by depending on the measurement result in the dynamic quantum circuit during execution; and respectively carrying out routing compiling on the at least one main line and the at least one control sub-line so as to sequentially execute the at least one main line after routing compiling and the control sub-line which is determined to be required to be executed after routing compiling on the superconducting quantum computing equipment according to the execution time sequence of the dynamic quantum line.

A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.

A sample holder includes: a pedestal made of metal; and a PCB (Printed Circuit Board) placed on the pedestal. The PCB includes a through opening that penetrates from a front surface to a rear surface of the PCB. The pedestal includes a cavity bottomed and with a top of the pedestal opened, the cavity formed at a portion corresponding to directly under the through opening on a side of the pedestal on which the PCB is placed. As a configuration on the side on which the PCB is placed, viewed from above, a part of the cavity is protruded outward from the through opening.

A superconducting computing apparatus includes: frequency tunable devices connected to each other and arranged in a shape; a ferromagnetic film disposed adjacent to the frequency tunable devices and having an up magnetic domain or a down magnetic domain; and a control circuit configured to adjust a position of a magnetic domain wall in the ferromagnetic film by applying a current to the ferromagnetic film, wherein the position of the magnetic domain wall controls a resonant frequency of the frequency tunable devices.

The invention provides a coaxial cable of a dilution refrigerator based on a superconductor, the dilution refrigerator and superconducting quantum computing equipment. The dilution refrigerator at least comprises a first temperature layer, a second temperature layer, a third temperature layer and a fourth temperature layer, the coaxial cable comprises a conductor layer, an insulating layer and a first shielding layer, and the first shielding layer is arranged on the insulating layer with a first thickness; the coaxial cable includes: a first coaxial cable section disposed in the first temperature layer; the second coaxial cable section is arranged in the second temperature layer; the third coaxial cable section is arranged in the third temperature layer; the fourth coaxial cable section is arranged in the fourth temperature layer; wherein the first thicknesses and materials of the first shielding layers of the first coaxial cable section, the second coaxial cable section, the third coaxial cable section and the fourth coaxial cable section are determined according to a preset combination mode.

The invention provides a quantum bit unit mapping method, a related device and a medium. The method comprises the following steps: acquiring a gate operation sequence and a plurality of logic quantum bits; arranging the plurality of logic quantum bits into a first sequence according to a preset sorting rule; mapping the logic quantum bits in the first sequence to physical hardware resources to obtain a plurality of candidate physical bit units corresponding to the logic quantum bits, and determining a target evaluation result of the combined AND gate operation sequence for each combination of the plurality of candidate physical bit units corresponding to each logic quantum bit, determining a target physical bit unit in a plurality of candidate physical bit units corresponding to the logic quantum bit based on the target evaluation result; and mapping each logic quantum bit in the first sequence into a target physical bit unit corresponding to the logic quantum bit. According to the method and the device, the number of the swap gates needing to be increased in the mapping process can be reduced, and the bit mapping quality is improved. The method can be applied to various scenes such as quantum calculation and superconducting quantum calculation.

The multifunctional control circuit comprises an FPGA (Field Programmable Gate Array) logic module, an LDO (Low Dropout Regulator) power supply module and a superconducting quantum computing chip which are in communication connection in sequence, the FPGA logic module comprises an AWG waveform memory, an AWG waveform playing controller, a bypass SFDR cancellation module and an RFSoC digital-to-analog conversion module which are in communication connection in sequence along the signal transmission direction, wherein the output end of the RFSoC digital-to-analog conversion module is set as the output end of the FPGA logic module; the FPGA logic module further comprises a clock synchronization module, and the clock synchronization module inputs a clock signal to the RFSoC digital-to-analog conversion module. According to the invention, the XY microwave pulse, the DC Pulse pulse and the DC Offset DC voltage are unified to be generated in the same FPGA and RFSoC architecture, the bypass SFDR cancellation module is added to generate a cancellation signal opposite to the phase of a spurious component, and the method has the advantages of significantly reducing the main spurious component in an output channel and improving the effective signal purity.

The invention belongs to the technical field of superconducting quantum computers, and discloses a control panel structure and a superconducting quantum computer. The control panel structure comprises a supporting plate, a middle layer and an integrated plate. The middle layer is arranged above the supporting plate, and the middle layer is arranged as a circuit board dielectric layer. The middle layer is provided with a plurality of hole groups, each hole group comprises a conducting hole and a plurality of shielding holes which penetrate through the upper surface and the lower surface of the middle layer, the plurality of shielding holes are arranged around the periphery of the conducting hole, and the conducting hole and the shielding holes are connected with the supporting plate through a first bonding pad; the integrated board is arranged above the middle layer, and the integrated board is connected with the via holes and the shielding holes through first bonding pads. According to the control panel structure, the main body material of the middle layer is the circuit board material, so that the thickness of the middle layer can be conveniently regulated and controlled, and the mounting height can be adjusted according to requirements. The superconducting quantum computer comprises the control panel structure, and the support plate is mainly used for loading connected lines (such as optical fibers or coaxial lines).

The invention provides a pulse excitation microwave generation device for a quantum limit amplifier, and relates to the technical field of superconducting quantum calculation and other weak microwave signal measurement. The pulse excitation microwave generation device for the quantum limit amplifier comprises a microwave source used for generating continuous microwave signals; the microwave signal direct generation device is used for generating a pulse microwave signal; the frequency mixer is used for carrying out frequency mixing on the continuous microwave signal and the pulse microwave signal to generate a frequency mixing signal; the band-pass filter is used for filtering the frequency mixing signal; and the power amplifier is used for amplifying the filtered frequency mixing signal and generating pulse excitation microwaves for the quantum limit amplifier, so that the implementation cost is greatly reduced, the space occupied by equipment is reduced, and the space is saved.

Quantum computing systems require methods to control energies of qubits and couplers for quantum operations. Flux biasing of qubits and quantum couplers is provided for a superconducting quantum computer using single-flux-quantum (SFQ) technology. This method is applicable to a wide range of superconducting qubit structures and couplers, including transmons, fluxoniums, flux qubits, phase qubits and other superconducting qubits. This method enables arbitrary-amplitude time-varying flux biasing of qubits and couplers, due to a sequence of high-speed SFQ pulses. Several preferred embodiments are disclosed which provide high-fidelity control of fast single-qubit and multi-qubit operations.

The invention discloses a flexible transmission system for superconducting quantum computing, and belongs to the technical field of flexible transmission, the flexible transmission system comprises a normal temperature mounting disc, a sealing cavity capable of expanding in the Z-axis direction is mounted on the normal temperature mounting disc, and a multi-channel airtight connector module is mounted on the sealing cavity; the actual installation number of the multi-channel airtight connector modules can be adjusted within the range of 1-20 or above. According to the invention, through the designed multi-channel radio frequency rigid-flex board or flexible circuit board, the circuit in the FPC can stably work at a high frequency up to 10GHz at normal temperature and low temperature, and has excellent performances of low insertion loss, return loss and the like, the installation height and the bending degree are adjusted through the first section of flexible transmission circuit board Rigiid-Flex PCB / FPC, and the installation efficiency is improved. The path length difference is compensated, the transmission length of each path of signal is ensured to be consistent, the transmission loss consistency of each channel is further ensured, and a stable and reliable signal transmission basis is provided for the superconducting quantum computer.

The invention discloses a multifunctional dust collector for cleaning a cavity of thin film deposition equipment, and relates to the technical field of superconducting quantum computing, the multifunctional dust collector comprises a dust collector body and a water filtering pipe, the water filtering pipe is installed on the left side face of the dust collector body, and a water filtering device is installed in the dust collector body. Through the cooperation of the water filtering pipe, the water filtering device, the polymer sponge filtering device, the magnetic suction dust collection head assembly and the ultrasonic dust collection head assembly, the replaceable dust collection head can be flexibly selected according to the type and the requirement of the cavity, and the magnetic suction dust collection head assembly can accurately adsorb metal substances in the metallized cavity and prevent chippings from splashing. The ultrasonic dust collection head assembly can enable film particles adhered to the inner wall of the cavity to be separated, the problem that a common dust collector is small in suction force is solved, the water filtering pipe and the water filtering device cooperate to enable dust-containing air to make full contact with water for primary purification, and the macromolecule sponge filtering device can finely intercept small particles.

This invention discloses a method for controlling the thermal relaxation path of superconducting nanostructures and its application. This method utilizes a van der Waals integration strategy to sequentially fabricate a molybdenum disulfide layer on a silicon / silicon oxide substrate using chemical solution deposition and a niobium nitride superconducting layer using magnetron sputtering, constructing a niobium nitride / molybdenum disulfide heterostructure with intrinsic anisotropic thermal conductivity. Superconducting nanodevices with specific geometric configurations are designed for this heterostructure. Leveraging the ultra-high in-plane thermal conductivity of molybdenum disulfide and its suppressed out-of-plane heat transfer characteristics, the method achieves directional control of the internal thermal relaxation path of the superconducting nanostructure, verifying its dual advantages of optimizing thermal management and enhancing superconducting performance. The control method of this invention is mature and controllable, effectively transforming disordered thermal relaxation into directional heat transfer, significantly improving the thermal stability and integration density of superconducting devices, and providing a core solution for the thermal management of nanocircuits in fields such as superconducting quantum computing and high-sensitivity quantum detection.

A Josephson parametric amplifier packaging module, relating to the technical field of quantum computing. The Josephson parametric amplifier packaging module comprises a substrate (1), a magnetic shield (2), a circulator (3) and a Josephson parametric amplifier (4). The magnetic shield (2) is fixed on the substrate (1), and the magnetic shield (2) comprises a first cavity (201) and a second cavity (202). The circulator (3) and the Josephson parametric amplifier (4) are respectively located in the first cavity (201) and the second cavity (202), the circulator (3) comprises a first port (31), a second port (32) and a third port (33), and the Josephson parametric amplifier (4) comprises a signal port (41) and a pump port (42). The second port (32) is coupled to the signal port (41) by means of a connector (5), and the first port (31), the third port (33) and the pump port (42) extend to the exterior of the magnetic shield (2).

An air-bridge type superconducting coupler is provided. A frequency-fixed superconducting coupler includes: a bridge over a substrate, the bridge comprised of superconducting material, the bridge having two ends that each comprise a respective contact pad, each contact pad having an electrical connection to a respectively corresponding superconducting qubit, and each contact pad directly or indirectly contacting the substrate, wherein there is a gap between the substrate and a corresponding portion of the bridge that is between the contact pads.

The invention provides a multi-quantum-bit control system and method, and relates to the technical field of superconducting quantum computing. The multi-quantum bit control system comprises a first common microwave transmission line and a quantum bit measurement and control unit. The quantum bit measurement and control unit comprises a superconducting quantum bit; the quantum bit driving cavity applies a driving microwave pulse for near resonance with the superconducting quantum bit to the quantum bit driving cavity through a first common microwave transmission line, and the frequency of the driving microwave pulse is matched with the resonant frequency of the quantum bit driving cavity, so that the quantum bit driving cavity generates near resonance, and the superconducting quantum bit is driven. Performing a single quantum bit gate operation on the superconducting quantum bits; and the quantum bit magnetic flux bias circuit is in coupled connection with the superconducting quantum bit and is used for applying a first bias pulse signal to the superconducting quantum bit so as to adjust the quantum bit frequency of the superconducting quantum bit, so that the superconducting quantum bit and the quantum bit driving cavity are in near resonance.

A distributed multi-bit superconducting quantum computing ultra-low temperature and signal transmission system of the present invention relates to the field of cryogenic refrigeration and quantum computing, including: one or more centrally located ultra-low temperature main systems for serving quantum chips and multiple ultra-low temperature subsystems that undertake the signal input and output functions of quantum chips, which are fixed in the first space formed by the main cover plate and the system vacuum cover, and the first space is connected to a signal source and a room temperature signal processing module; the ultra-low temperature subsystem is connected to the ultra-low temperature main system by a cable, so that low temperature signal transmission can be realized. By distributing the low temperature signal transmission system of the multi-bit quantum chip in the ultra-low temperature subsystem, the heat load and space load in the ultra-low temperature main system are reduced, thereby improving the ability of the ultra-low temperature main system to carry quantum chips with higher bit numbers, and providing a solution for realizing superconducting quantum computing technology at the ten-thousand-bit level.

The embodiment of the invention discloses a quantum circuit and a quantum computer applied to a QAOA algorithm, and relates to the technical field of quantum computing, and by setting a plurality of controlled NOT gates, any quantum bit can be used as a control bit of the controlled NOT gate and can also be used as a controlled bit of the controlled NOT gate, so that the quantum circuit and the quantum computer can be applied to the QAOA algorithm. The information interaction of any quantum bit in the plurality of quantum bits can be conveniently realized. Due to the arrangement mode, when the QAOA algorithm is used for solving the dense QUBO problem, a logic gate needed in an adopted quantum circuit is only a neighbor double-quantum logic gate, and the overall circuit design is matched with a chained chip structure, so that implementation on the superconductive quantum calculation chip level at the present stage is facilitated, and the method has important significance on application and development of quantum calculation.

The present disclosure relates to a method, system, and computer program product for improving discrimination between qubit states in a superconducting quantum computer. The channel is calibrated to train the kernel such that it contains correct calibration data ("kernel state"). After calibrating the channel, a test is performed that simultaneously performs quantum operations on the qubits in adjacent channels, including the most recently calibrated channel, to determine whether a difference between a kernel response and an expected kernel response exceeds a threshold, where the expected kernel response is based on a kernel state of a trained kernel of the most recently calibrated channel. If the condition occurs, the signal phase of the recently calibrated channel is shifted, and the channel recalibration (using the phase shift signal) and the test process are repeated until the difference value between the kernel response and the expected kernel response does not exceed the threshold value any more.

The invention relates to the technical field of quantum information, and discloses an integrated superconducting quantum bit radio frequency module, which comprises a distribution board card, a merging board card, a reading board card and a case shell, and is characterized in that the distribution board card and the merging board card are connected and fixed through an inter-board radio frequency connector; the assembling number of the combination board cards is determined by the final distribution number of the distribution board card power division circuit, an IQ signal of an IQ combiner in the distribution board card is connected to the board connection vertical paste connector after passing through the Gaussian filter circuit, and other signals, except the IQ signal, of the IQ combiner in the distribution board card are connected in and out from the side paste radio frequency connector; the function structure of the reading board card is similar to that of the distribution board card, and the reading board card is used for controlling a reading circuit of the superconducting quantum computing chip.